Method of making heel-scrapers for plows



UNITE STATES PATENT OFFIcE.

HENRY 'JERRELL, OF CONYERS, GEORGIA.

METHOD OF MAKING HEEL-SCRAPERS FOR PLOWS.

:SPEGIFIGATION forming part of Letters Patent No. 406,677, dated July 9, 1889.

Application filed March 29, 1889. Serial No. 305,240. (No model.)

To all whom it may concern:

Be it known that I, HENRY D. TERRELL, of Conyers, in the county of Rockdale and State of Georgia,have invented a new and Improved Method of Manufacturing Heel-Scrapers 0r Sweeps for Plows, of which the following is a full, clear, and exact description.

This invention relates to heel-scrapers or sweeps for plows, which are beveled on their scraping-edge and are bent intermediately of their length to an angle of forty-five degrees, more or less.

Heretofore it has been customary to construct such heel-scrapers or sweeps by first rolling a steel bar of uniform thickness, or thereabout throughout its width, then heating said bar to bend it intermediately of its length to the required angle of thescraper or sweep, and afterward to hammer it to give to it the necessary bevel or sharpened edge.- This method of making the scraper or sweep necessitates a subsequent heating of the whole tempered bar in order to bend it as required and to bevel or sharpen it, which takes out the temper and makes the scraper soft, causing it to wear fast. Neither is it practicable under such method of making to give to the scraper or sweep other than a very limited bevel, because the metal will become too cold to admit of its being hammered to a slower or longer bevel, and which it is desirable it should have, not only as contributing to. the lightness of the sweep, but to make the sharpened edge wear longer and to admit of its being more easily resharpened when required.

My improved method of making such sharpened bent scrapers consists in first rolling the steel bar of which the scraper is made, with a bevel on its one side to give it a sharpened edge, as steel for other scrapers of a straight and different character has been rolled to a beveled edge, and then heating said bar in the center of its length and bending it to the required shape, substantially as hereinafter described, and pointed out in the claim.

Reference is to be had to the accompanying drawings, forming a part of this specification,

in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 represents a View in perspective of the rolled sharpenedor bevel-edged steel bar from which the bent scraper is made. Fig. 2 is a perspective view of the scraper-bar after it has been bent to give it the required angle, and Fig. 3 a perspective view of the finished scraper or sweep.

I first roll a straight bar, as shown in Fig. 1, with a deep or slow bevel b on its one side to give it a sharpened edge. This bar is of a suitable width and length to form the bent scraper; or itmay be cut of the required length from a longer bar. bevel-edged bar in the center of its length and bend it to the required angular shape of the scraper or sweep, as shown in Fig. 2. By thus only reheating the scraper-bar in its center, not only is the cost of heating the whole bar saved, but the original temper of the bar is preserved at the ends of the scraper, which adds to the wearof the latter. By my improved method, too, the cost of hammering the bent scraper to a bevel edge, which is considerable, is saved. A much deeper and slower bevel, likewise, can be made without extra cost and to the saving of steel, and such deeper and slower bevel will cause the scraper to wear longer before it will need resharpening, and admit of it being readily sharpened with a file when required. Thus the bent scraper can be made cheaper, better, and with its temper preserved at each end. Ordinarily, or under the old method, these bent scrapers are made from metal of about threesixteenths to a quarter of an inch thick, and a bevel cannot well be hammered more than five-eighths to three-quarters of an inch deep, whereas by myimproved method the bevel of said bent scraper can readily be made from one and a half to two inches deep, although I do not restrict the bevel to any particular depth. I

Fig. 3 shows the finished scraper or sweep, which only differs from Fig. 2 in its center portion having an additional back-set given I then heat said heating said bar at its center and then bend- 1o ing it edgewise rearwardly at Opposite sides of its center to forrnthe inclined scrapingblades, substantially as set forth.

I HENRY D. TERRELL.

Witnesses:

DAVID M AHMUD, E. L. MCDANIEL. 

